Shared TAN number to new employer - can I approach the new employer and apologize & request them to archive this document?

Hi, I have got an offer from a new company, and I was negotiating to revise my salary as some of the comps were not included in my current CTC. During communications and document exchanges, I have inadvertently sent a tax-calculating document that includes my current company's TAN number.

I am worried that this could be considered a breach of confidentiality.
And If yes, then can I approach the new employer and apologize & request them to archive this document?

Please advise.
Thanks.